<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" />
    </label>
    <span>
      <span>已完成{{ allComplete }}</span> / 全部{{ todoList.length }}
    </span>
    <button class="btn btn-danger">清除已完成任务</button>
  </div>
</template>

<script>
import _ from "lodash";
export default {
  name: "Footer",
  data() {
    return {
      todoList: [],
    };
  },
  beforeMount() {
    //初始化的时候,给$bus绑定自定义事件,获取todoList的值
    //我们暂时放在beforeMount中,能让调用事件晚于绑定事件执行
    this.$bus.$on("getTodos", (todoList) => {
      console.log(1);
      this.todoList = _.cloneDeep(todoList);
    });
  },
  computed: {
    allComplete() {
      return this.todoList.reduce((p, c) => {
        return c.done ? p + 1 : p;
      }, 0);
    },
  },
};
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>